Incandescent gas-light.



No. 817,081; PATENTED APR. 3, 1906.

\ s. MASON.

INGANDESGENT GAS LIGHT.

APPLICATION FILED D110. 8. 1905.

WM'NESSES INVEMTOR WWW SIDNEY MASON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO W ELSBAOH LIGHT COMPANY,

OF GLOUCESTER CITY, NEW J ER- SEY, A CORPORATION OF NEW JERSEY.

lNCMWDlES-CEIMT Gil tS tlC-lit'l'l'n Specification of Letters Patent.

Patented April 3, 1906.

Application filed December 8, 1905. Serial No. 290,879.

To all whom it may concern:

Be it known that I, SIDNEY M'AsoN, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Incandescent Gas-Lights, of which the following is a specification, reference being had to the accompanying drawings, forming part of this specification, in Which- Figure 1 is a side elevation of my improved globe with the incandescing lightingmantle therein, the latter being shown in dotted lines. Fig. 2 is a cross-section through the globe, and Fig. 3 is a section on the line III III of Fig. 1.

The purpose of my invention is to provide novel and el'licient means for utilizing incandescent gas-lighting mantles in inverted positions. Mantles designed for this purpose are generally of approximately senliglobular form and are set on the burner in such manner that the gas flame is directed. down wardly therein. To use such mantles elliciently, the air must be supplied in an even manner, for if currents of air should strike the mantles in greater volume at one point than another it will produce a defective and irregular flame. It has been attempted to obtain this result by the use of a glass globe having perforations at the sides and made of substantially uniform diameter from. top to bottom or of somewhat greater diameter at the bottom, where the perforations are situated, than at the top; but such globes have not produced satisfactory results, for the air entering the lateral perforations impinges upon the mantle unevenly and produces an irregular flame. It has also been attempted. to accomplish the result by using a globe having a central opening at the bottom; but while this will supply the air in a regular stream it involves danger in the use of the light, because such mantles sometimes accumulate. carbon, which, becoming incandescent, Will drop through the bottom opening, causing liability of lire in the building. For this reason such globes are not approved by the insurance companies.

My invention overcomes the di'l'liculties above mentioned and provides a safe light in which the air is supplied uniformly and the best and the most satisfactory operation of the mantle is secured.

The invention consists in the combination, with. an inverted incandescing mantle, of a globe in which. the same is contained, said globe having below the mantle a constricted central passage and below said constricted passage having lateral perforations through which the external air is admitted.

In the drawings, 2 represents the incandes cing mantle set in inverted position within the globe 3. This globe has below the mantle a constricted central passage 4, and below this passage is a chamber5, having lateral openings 6, through which the external air is admitted and from which. it passes upwardly through the constricted portion 4 to the mantle. The entire globe, including the parts 3 and 5, is made of glass in a single piece, and if any incandescent carbonized material should drop from the mantle it will be caught in the base of the portion 5 and will be prevented from dropping on, the floor.

Within the scope of my invention the form and design of the parts may be changed in many ways, since What I claim 1's- 1.. A glass globe for inverted incandescing mantles having .in the lower part of the body portion a constricted central passage of smaller diameter than the body, and opening into a lower chamber having lateral air-openings.

2. A glass globe for inverted incandescing mantles having at its lower end a chamber with a closed bottom and lateral air-openings, said. chamber communicating with the body of the globe through a constricted central air-passage.

3. A glass globe for inverted incandescing mantles provided at its lower end with a chamber having a closed bottom and airopenings in its side portions, said chamber connecting with the globe-body through a constricted central air-passage.

In testimony whereof I have hereunto set my h and.

SIDNEY MASON. Witnesses:

J. LENTON,

JOHN S. McCoy. 

